In general, the watch is excellent! I didn't regret the purchase. Now you are always in touch, even if the phone is in your backpack. I tried to measure the level of stress, everything seems to be normal. But I still don’t really understand how and what is in this function. The oxygen in the blood was measured. To be honest, I don’t really believe these data, but for me this is not the most important question. Comfortable, light strap is quite resistant to dirt. They write that you can swim in the pool with them. But I haven't tried. Launched training functions. Until I figure out what exactly it gives me)) I recommend to buy.
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